<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                        v-for="item of hot" 
                        :key="item.id"
                        @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" 
                v-for="(item,key) of cities" 
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)"
                    > 
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default {
    name:'CityList',
    props:{
        hot:Array,
        cities:Object,
        letter:String
    },
    computed:{
        ...mapState({
            currentCity:'city'
        })
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    watch:{
        letter(){
            // console.log(this.letter)
            const element = this.$refs[this.letter][0]
            // console.log(element)
            this.scroll.scrollToElement(element)
        }
    },
    mounted(){
        this.scroll=new Bscroll(this.$refs.wrapper,{click: true})
    }   
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color:#ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color:#ccc
    .list
        overflow:hidden
        position:absolute
        top:1.74rem
        left:0
        right:0
        bottom:0
        .title
            line-height:.54rem
            background:#eee
            padding-left:.2rem
            color:#666
            font-size:.26rem
        .button-list
            overflow:hidden
            padding:.1rem .6rem .1rem  .1rem
            .button-wrapper
                width:33.33%
                float:left
                .button
                    margin:.1rem
                    padding: .1rem 0
                    text-align:center
                    border:.02rem solid #ccc
                    border-radius: .06rem
    .item-list
        .item
            line-height:.76rem
            padding-left:.2rem
</style>